Wong , Nellie Su Chee
(2016)
Development And Competition In Rice Weevil, Sitophilus Oryzae (L.) And Red Flour Beetle, Tribolium Castaneum (Herbst), And Their Responses To Active Compounds In Selected Spices.
PhD thesis, Universiti Sains Malaysia.
Abstract
Serangga hasil simpanan menyebabkan lebih daripada 20% jumlah kerosakan
pada hasil simpanan di negara membangun dan lebih daripada 9% jumlah kerosakan
di negara-negara maju setiap tahun. Keselamatan makanan adalah terancam
terutamanya dengan peningkatan pesat dalam populasi dunia. Tesis ini bertumpu
pada aspek kelakuan dan kawalan Sitophilus oryzae (L.) dan Tribolium castaneum
(Herbst). Keduanya adalah antara dua serangga hasil simpanan yang paling biasa
menyerang hasil simpanan di negara tropika. Satu kajian mengenai kadar
perkembangan serangga ini di dalam medium yang berbeza telah dijalankan.
Sitophilus oryzae didedahkan kepada beras perang, beras tempatan, beras parboiled,
beras calrose, beras basmathi, beras merah, beras pulut hitam, dan beras wangi.
Kumbang-kumbang tersebut lebih suka medium dengan kandungan karbohidrat yang
lebih rendah tetapi kandungan abu dan serat yang lebih tinggi.
Stored product insects causes more than 20 % in total damages to stored
products in developing countries and 9 % in total damages to stored products in
developed countries on a yearly basis. Food security is threatened especially with the
rapid increase in world population. This thesis focuses on the behavioural and control
aspects of Sitophilus oryzae (L.) and Tribolium castaneum (Herbst). Both are two of
the most common stored products insect attacking stored products in tropical
countries. A study on the insects’ development rates in different mediums were
carried out. Sitophilus oryzae were exposed to unpolished brown rice, local polished
rice, parboiled rice, calrose rice basmati rice, red rice, black glutinous rice and
fragrant polished rice. The weevils preferred mediums with lower carbohydrate
contents but higher contents of ash and fibre.
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